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Stax


Streaming API for XML (StAX) is an application programming interface (API) to read and write XML documents, originating from the Java programming language community.

Traditionally, XML APIs are either:

Both have advantages: DOM, for example, allows for random access to the document, and SAX has a small memory footprint and is typically much faster.

These two access metaphors can be thought of as polar opposites. A tree based API allows unlimited, random access and manipulation, while an event based API is a 'one shot' pass through the source document.

StAX was designed as a median between these two opposites. In the StAX metaphor, the programmatic entry point is a cursor that represents a point within the document. The application moves the cursor forward - 'pulling' the information from the parser as it needs. This is different from an event based API - such as SAX - which 'pushes' data to the application - requiring the application to maintain state between events as necessary to keep track of location within the document.

StAX has its roots in a number of incompatible pull APIs for XML, most notably XMLPULL, the authors of which (Stefan Haustein and Aleksander Slominski) collaborated with, amongst others, BEA Systems, Oracle, Sun and James Clark.

From JSR-173 Specification• Final, V1.0 (used under fair use).

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Competing and complementary ways to process XML in Java (the order is loosely based on initial date of introduction):



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